Merge pull request #2 from cfe-lab/invert-y

Addtional updates for drawsvg >2.0

genetracks/elements.py

@@ -43,18 +43,18 @@ def show(self, w=None, h=None):
         if h is None:
             h = self.h
 
-        d = draw.Drawing(self.w * xscale, h, origin=(0,0))
+        d = draw.Drawing(self.w * xscale, h, origin=(0,0), context=draw.Context(invert_y=True))
         for y, element in self.elements:
             d.append(element.draw(xscale=xscale, y=y-h))
 
 #        d.setRenderSize(w, h)
         return d
 
     def to_svg(self, path, w=None, h=None):
-        self.show(w=w, h=h).save_svg(path)
+        self.show(w=w, h=h).save_svg(path, context=draw.Context(invert_y=True))
 
     def to_png(self, path, w=None, h=None):
-        self.show(w=w, h=h).save_png(path)
+        self.show(w=w, h=h).save_png(path, context=draw.Context(invert_y=True))
 
 
 class Element:
@@ -174,7 +174,7 @@ def draw(self, x=None, y=0, xscale=1.0):
 
         d = draw.Group(transform="translate({} {})".format(x, y))
         d.append(draw.Text(self.text, self.font_size, self.w,
-                 (self.font_size/2 + offset), font_family='monospace', center=True))
+                 offset, font_family='monospace', text_anchor='middle'))
         return d
 
 

genetracks/plasmid.py

@@ -12,7 +12,7 @@ def __init__(self, length, regions=[], size=400, color='lightgrey'):
         self.color = color
 
     def show(self):
-        d = draw.Drawing(1.4, 1.4, origin='center')
+        d = draw.Drawing(1.4, 1.4, origin='center', context=draw.Context(invert_y=True))
 
         d.append(draw.Circle(0, 0, 0.5, stroke_width='0.005', stroke=self.color,
                              fill_opacity='0.0'))